MH370 may have fallen victim to a saboteur who “snuck on” the plane with a USB stick or another method of initiating a cyberattack on the plane, according to one expert.

Malaysia Airlines flight 370 went missing on March 8, 2014, en route from Kuala Lumpur to Beijing with 239 people on board, never to be seen again. It remains a mystery to this day what happened to the plane, but there are dozens of theories. One possibility is that someone snuck onto the plane in hours before take-off in an attempt to stop the plane reaching its destination.

“Was there an opportunity for someone to get on with a USB stick or in other ways to initiate a cyberattack on the plane so it would never reach its destination?”

Other aviation experts in the documentary emphasised the importance of getting to the bottom of the MH370 mystery.

Not only is it very important for families to get closure on the tragedy, it is also important to stop such an occurrence ever happening again.

For example, if it was a technical error with the plane that was to blame, this could affect other planes and would need to be identified as soon as possible for future passengers' safety and security.

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Aviation journalist David Learmount told Channel 5: “Learning what the fate of MH370 was is very important, because those of us in the aviation industry don’t like not knowing what happened to an aeroplane.

“It might have been a human thing, it might have been a technical thing.

“But especially if it was a technical thing we want to know what it was.”

One family member spoke to the documentary, imploring the authorities to help loved ones get some answers.